drivers/clk/rockchip/clk_rk3328.c

   1 /*
   2  * (C) Copyright 2017 Rockchip Electronics Co., Ltd
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8 #include <bitfield.h>
   9 #include <clk-uclass.h>
  10 #include <dm.h>
  11 #include <errno.h>
  12 #include <syscon.h>
  13 #include <asm/arch/clock.h>
  14 #include <asm/arch/cru_rk3328.h>
  15 #include <asm/arch/hardware.h>
  16 #include <asm/io.h>
  17 #include <dm/lists.h>
  18 #include <dt-bindings/clock/rk3328-cru.h>
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 struct pll_div {
  23         u32 refdiv;
  24         u32 fbdiv;
  25         u32 postdiv1;
  26         u32 postdiv2;
  27         u32 frac;
  28 };
  29
  30 #define RATE_TO_DIV(input_rate, output_rate) \
  31         ((input_rate) / (output_rate) - 1);
  32 #define DIV_TO_RATE(input_rate, div)    ((input_rate) / ((div) + 1))
  33
  34 #define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\
  35         .refdiv = _refdiv,\
  36         .fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ),\
  37         .postdiv1 = _postdiv1, .postdiv2 = _postdiv2};
  38
  39 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 1, 4, 1);
  40 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 2, 2, 1);
  41
  42 static const struct pll_div apll_816_cfg = PLL_DIVISORS(816 * MHz, 1, 2, 1);
  43 static const struct pll_div apll_600_cfg = PLL_DIVISORS(600 * MHz, 1, 3, 1);
  44
  45 static const struct pll_div *apll_cfgs[] = {
  46         [APLL_816_MHZ] = &apll_816_cfg,
  47         [APLL_600_MHZ] = &apll_600_cfg,
  48 };
  49
  50 enum {
  51         /* PLL_CON0 */
  52         PLL_POSTDIV1_SHIFT              = 12,
  53         PLL_POSTDIV1_MASK               = 0x7 << PLL_POSTDIV1_SHIFT,
  54         PLL_FBDIV_SHIFT                 = 0,
  55         PLL_FBDIV_MASK                  = 0xfff,
  56
  57         /* PLL_CON1 */
  58         PLL_DSMPD_SHIFT                 = 12,
  59         PLL_DSMPD_MASK                  = 1 << PLL_DSMPD_SHIFT,
  60         PLL_INTEGER_MODE                = 1,
  61         PLL_LOCK_STATUS_SHIFT           = 10,
  62         PLL_LOCK_STATUS_MASK            = 1 << PLL_LOCK_STATUS_SHIFT,
  63         PLL_POSTDIV2_SHIFT              = 6,
  64         PLL_POSTDIV2_MASK               = 0x7 << PLL_POSTDIV2_SHIFT,
  65         PLL_REFDIV_SHIFT                = 0,
  66         PLL_REFDIV_MASK                 = 0x3f,
  67
  68         /* PLL_CON2 */
  69         PLL_FRACDIV_SHIFT               = 0,
  70         PLL_FRACDIV_MASK                = 0xffffff,
  71
  72         /* MODE_CON */
  73         APLL_MODE_SHIFT                 = 0,
  74         NPLL_MODE_SHIFT                 = 1,
  75         DPLL_MODE_SHIFT                 = 4,
  76         CPLL_MODE_SHIFT                 = 8,
  77         GPLL_MODE_SHIFT                 = 12,
  78         PLL_MODE_SLOW                   = 0,
  79         PLL_MODE_NORM,
  80
  81         /* CLKSEL_CON0 */
  82         CLK_CORE_PLL_SEL_APLL           = 0,
  83         CLK_CORE_PLL_SEL_GPLL,
  84         CLK_CORE_PLL_SEL_DPLL,
  85         CLK_CORE_PLL_SEL_NPLL,
  86         CLK_CORE_PLL_SEL_SHIFT          = 6,
  87         CLK_CORE_PLL_SEL_MASK           = 3 << CLK_CORE_PLL_SEL_SHIFT,
  88         CLK_CORE_DIV_SHIFT              = 0,
  89         CLK_CORE_DIV_MASK               = 0x1f,
  90
  91         /* CLKSEL_CON1 */
  92         ACLKM_CORE_DIV_SHIFT            = 4,
  93         ACLKM_CORE_DIV_MASK             = 0x7 << ACLKM_CORE_DIV_SHIFT,
  94         PCLK_DBG_DIV_SHIFT              = 0,
  95         PCLK_DBG_DIV_MASK               = 0xF << PCLK_DBG_DIV_SHIFT,
  96
  97         /* CLKSEL_CON28 */
  98         ACLK_PERIHP_PLL_SEL_CPLL        = 0,
  99         ACLK_PERIHP_PLL_SEL_GPLL,
 100         ACLK_PERIHP_PLL_SEL_HDMIPHY,
 101         ACLK_PERIHP_PLL_SEL_SHIFT       = 6,
 102         ACLK_PERIHP_PLL_SEL_MASK        = 3 << ACLK_PERIHP_PLL_SEL_SHIFT,
 103         ACLK_PERIHP_DIV_CON_SHIFT       = 0,
 104         ACLK_PERIHP_DIV_CON_MASK        = 0x1f,
 105
 106         /* CLKSEL_CON29 */
 107         PCLK_PERIHP_DIV_CON_SHIFT       = 4,
 108         PCLK_PERIHP_DIV_CON_MASK        = 0x7 << PCLK_PERIHP_DIV_CON_SHIFT,
 109         HCLK_PERIHP_DIV_CON_SHIFT       = 0,
 110         HCLK_PERIHP_DIV_CON_MASK        = 3 << HCLK_PERIHP_DIV_CON_SHIFT,
 111
 112         /* CLKSEL_CON22 */
 113         CLK_TSADC_DIV_CON_SHIFT         = 0,
 114         CLK_TSADC_DIV_CON_MASK          = 0x3ff,
 115
 116         /* CLKSEL_CON23 */
 117         CLK_SARADC_DIV_CON_SHIFT        = 0,
 118         CLK_SARADC_DIV_CON_MASK         = GENMASK(9, 0),
 119         CLK_SARADC_DIV_CON_WIDTH        = 10,
 120
 121         /* CLKSEL_CON24 */
 122         CLK_PWM_PLL_SEL_CPLL            = 0,
 123         CLK_PWM_PLL_SEL_GPLL,
 124         CLK_PWM_PLL_SEL_SHIFT           = 15,
 125         CLK_PWM_PLL_SEL_MASK            = 1 << CLK_PWM_PLL_SEL_SHIFT,
 126         CLK_PWM_DIV_CON_SHIFT           = 8,
 127         CLK_PWM_DIV_CON_MASK            = 0x7f << CLK_PWM_DIV_CON_SHIFT,
 128
 129         CLK_SPI_PLL_SEL_CPLL            = 0,
 130         CLK_SPI_PLL_SEL_GPLL,
 131         CLK_SPI_PLL_SEL_SHIFT           = 7,
 132         CLK_SPI_PLL_SEL_MASK            = 1 << CLK_SPI_PLL_SEL_SHIFT,
 133         CLK_SPI_DIV_CON_SHIFT           = 0,
 134         CLK_SPI_DIV_CON_MASK            = 0x7f << CLK_SPI_DIV_CON_SHIFT,
 135
 136         /* CLKSEL_CON30 */
 137         CLK_SDMMC_PLL_SEL_CPLL          = 0,
 138         CLK_SDMMC_PLL_SEL_GPLL,
 139         CLK_SDMMC_PLL_SEL_24M,
 140         CLK_SDMMC_PLL_SEL_USBPHY,
 141         CLK_SDMMC_PLL_SHIFT             = 8,
 142         CLK_SDMMC_PLL_MASK              = 0x3 << CLK_SDMMC_PLL_SHIFT,
 143         CLK_SDMMC_DIV_CON_SHIFT          = 0,
 144         CLK_SDMMC_DIV_CON_MASK           = 0xff << CLK_SDMMC_DIV_CON_SHIFT,
 145
 146         /* CLKSEL_CON32 */
 147         CLK_EMMC_PLL_SEL_CPLL           = 0,
 148         CLK_EMMC_PLL_SEL_GPLL,
 149         CLK_EMMC_PLL_SEL_24M,
 150         CLK_EMMC_PLL_SEL_USBPHY,
 151         CLK_EMMC_PLL_SHIFT              = 8,
 152         CLK_EMMC_PLL_MASK               = 0x3 << CLK_EMMC_PLL_SHIFT,
 153         CLK_EMMC_DIV_CON_SHIFT          = 0,
 154         CLK_EMMC_DIV_CON_MASK           = 0xff << CLK_EMMC_DIV_CON_SHIFT,
 155
 156         /* CLKSEL_CON34 */
 157         CLK_I2C_PLL_SEL_CPLL            = 0,
 158         CLK_I2C_PLL_SEL_GPLL,
 159         CLK_I2C_DIV_CON_MASK            = 0x7f,
 160         CLK_I2C_PLL_SEL_MASK            = 1,
 161         CLK_I2C1_PLL_SEL_SHIFT          = 15,
 162         CLK_I2C1_DIV_CON_SHIFT          = 8,
 163         CLK_I2C0_PLL_SEL_SHIFT          = 7,
 164         CLK_I2C0_DIV_CON_SHIFT          = 0,
 165
 166         /* CLKSEL_CON35 */
 167         CLK_I2C3_PLL_SEL_SHIFT          = 15,
 168         CLK_I2C3_DIV_CON_SHIFT          = 8,
 169         CLK_I2C2_PLL_SEL_SHIFT          = 7,
 170         CLK_I2C2_DIV_CON_SHIFT          = 0,
 171 };
 172
 173 #define VCO_MAX_KHZ     (3200 * (MHz / KHz))
 174 #define VCO_MIN_KHZ     (800 * (MHz / KHz))
 175 #define OUTPUT_MAX_KHZ  (3200 * (MHz / KHz))
 176 #define OUTPUT_MIN_KHZ  (16 * (MHz / KHz))
 177
 178 /*
 179  *  the div restructions of pll in integer mode, these are defined in
 180  *  * CRU_*PLL_CON0 or PMUCRU_*PLL_CON0
 181  */
 182 #define PLL_DIV_MIN     16
 183 #define PLL_DIV_MAX     3200
 184
 185 /*
 186  * How to calculate the PLL(from TRM V0.3 Part 1 Page 63):
 187  * Formulas also embedded within the Fractional PLL Verilog model:
 188  * If DSMPD = 1 (DSM is disabled, "integer mode")
 189  * FOUTVCO = FREF / REFDIV * FBDIV
 190  * FOUTPOSTDIV = FOUTVCO / POSTDIV1 / POSTDIV2
 191  * Where:
 192  * FOUTVCO = Fractional PLL non-divided output frequency
 193  * FOUTPOSTDIV = Fractional PLL divided output frequency
 194  *               (output of second post divider)
 195  * FREF = Fractional PLL input reference frequency, (the OSC_HZ 24MHz input)
 196  * REFDIV = Fractional PLL input reference clock divider
 197  * FBDIV = Integer value programmed into feedback divide
 198  *
 199  */
 200 static void rkclk_set_pll(struct rk3328_cru *cru, enum rk_clk_id clk_id,
 201                         const struct pll_div *div)
 202 {
 203         u32 *pll_con;
 204         u32 mode_shift, mode_mask;
 205
 206         pll_con = NULL;
 207         mode_shift = 0;
 208         switch (clk_id) {
 209         case CLK_ARM:
 210                 pll_con = cru->apll_con;
 211                 mode_shift = APLL_MODE_SHIFT;
 212                 break;
 213         case CLK_DDR:
 214                 pll_con = cru->dpll_con;
 215                 mode_shift = DPLL_MODE_SHIFT;
 216                 break;
 217         case CLK_CODEC:
 218                 pll_con = cru->cpll_con;
 219                 mode_shift = CPLL_MODE_SHIFT;
 220                 break;
 221         case CLK_GENERAL:
 222                 pll_con = cru->gpll_con;
 223                 mode_shift = GPLL_MODE_SHIFT;
 224                 break;
 225         case CLK_NEW:
 226                 pll_con = cru->npll_con;
 227                 mode_shift = NPLL_MODE_SHIFT;
 228                 break;
 229         default:
 230                 break;
 231         }
 232         mode_mask = 1 << mode_shift;
 233
 234         /* All 8 PLLs have same VCO and output frequency range restrictions. */
 235         u32 vco_khz = OSC_HZ / 1000 * div->fbdiv / div->refdiv;
 236         u32 output_khz = vco_khz / div->postdiv1 / div->postdiv2;
 237
 238         debug("PLL at %p: fbdiv=%d, refdiv=%d, postdiv1=%d, \
 239               postdiv2=%d, vco=%u khz, output=%u khz\n",
 240               pll_con, div->fbdiv, div->refdiv, div->postdiv1,
 241               div->postdiv2, vco_khz, output_khz);
 242         assert(vco_khz >= VCO_MIN_KHZ && vco_khz <= VCO_MAX_KHZ &&
 243                output_khz >= OUTPUT_MIN_KHZ && output_khz <= OUTPUT_MAX_KHZ &&
 244                div->fbdiv >= PLL_DIV_MIN && div->fbdiv <= PLL_DIV_MAX);
 245
 246         /*
 247          * When power on or changing PLL setting,
 248          * we must force PLL into slow mode to ensure output stable clock.
 249          */
 250         rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_SLOW << mode_shift);
 251
 252         /* use integer mode */
 253         rk_clrsetreg(&pll_con[1], PLL_DSMPD_MASK,
 254                      PLL_INTEGER_MODE << PLL_DSMPD_SHIFT);
 255
 256         rk_clrsetreg(&pll_con[0],
 257                      PLL_FBDIV_MASK | PLL_POSTDIV1_MASK,
 258                      (div->fbdiv << PLL_FBDIV_SHIFT) |
 259                      (div->postdiv1 << PLL_POSTDIV1_SHIFT));
 260         rk_clrsetreg(&pll_con[1],
 261                      PLL_POSTDIV2_MASK | PLL_REFDIV_MASK,
 262                      (div->postdiv2 << PLL_POSTDIV2_SHIFT) |
 263                      (div->refdiv << PLL_REFDIV_SHIFT));
 264
 265         /* waiting for pll lock */
 266         while (!(readl(&pll_con[1]) & (1 << PLL_LOCK_STATUS_SHIFT)))
 267                 udelay(1);
 268
 269         /* pll enter normal mode */
 270         rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_NORM << mode_shift);
 271 }
 272
 273 static void rkclk_init(struct rk3328_cru *cru)
 274 {
 275         u32 aclk_div;
 276         u32 hclk_div;
 277         u32 pclk_div;
 278
 279         /* configure gpll cpll */
 280         rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg);
 281         rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg);
 282
 283         /* configure perihp aclk, hclk, pclk */
 284         aclk_div = GPLL_HZ / PERIHP_ACLK_HZ - 1;
 285         hclk_div = PERIHP_ACLK_HZ / PERIHP_HCLK_HZ - 1;
 286         pclk_div = PERIHP_ACLK_HZ / PERIHP_PCLK_HZ - 1;
 287
 288         rk_clrsetreg(&cru->clksel_con[28],
 289                      ACLK_PERIHP_PLL_SEL_MASK | ACLK_PERIHP_DIV_CON_MASK,
 290                      ACLK_PERIHP_PLL_SEL_GPLL << ACLK_PERIHP_PLL_SEL_SHIFT |
 291                      aclk_div << ACLK_PERIHP_DIV_CON_SHIFT);
 292         rk_clrsetreg(&cru->clksel_con[29],
 293                      PCLK_PERIHP_DIV_CON_MASK | HCLK_PERIHP_DIV_CON_MASK,
 294                      pclk_div << PCLK_PERIHP_DIV_CON_SHIFT |
 295                      hclk_div << HCLK_PERIHP_DIV_CON_SHIFT);
 296 }
 297
 298 void rk3328_configure_cpu(struct rk3328_cru *cru,
 299                           enum apll_frequencies apll_freq)
 300 {
 301         u32 clk_core_div;
 302         u32 aclkm_div;
 303         u32 pclk_dbg_div;
 304
 305         rkclk_set_pll(cru, CLK_ARM, apll_cfgs[apll_freq]);
 306
 307         clk_core_div = APLL_HZ / CLK_CORE_HZ - 1;
 308         aclkm_div = APLL_HZ / ACLKM_CORE_HZ / (clk_core_div + 1) - 1;
 309         pclk_dbg_div = APLL_HZ / PCLK_DBG_HZ / (clk_core_div + 1) - 1;
 310
 311         rk_clrsetreg(&cru->clksel_con[0],
 312                      CLK_CORE_PLL_SEL_MASK | CLK_CORE_DIV_MASK,
 313                      CLK_CORE_PLL_SEL_APLL << CLK_CORE_PLL_SEL_SHIFT |
 314                      clk_core_div << CLK_CORE_DIV_SHIFT);
 315
 316         rk_clrsetreg(&cru->clksel_con[1],
 317                      PCLK_DBG_DIV_MASK | ACLKM_CORE_DIV_MASK,
 318                      pclk_dbg_div << PCLK_DBG_DIV_SHIFT |
 319                      aclkm_div << ACLKM_CORE_DIV_SHIFT);
 320 }
 321
 322
 323 static ulong rk3328_i2c_get_clk(struct rk3328_cru *cru, ulong clk_id)
 324 {
 325         u32 div, con;
 326
 327         switch (clk_id) {
 328         case SCLK_I2C0:
 329                 con = readl(&cru->clksel_con[34]);
 330                 div = con >> CLK_I2C0_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 331                 break;
 332         case SCLK_I2C1:
 333                 con = readl(&cru->clksel_con[34]);
 334                 div = con >> CLK_I2C1_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 335                 break;
 336         case SCLK_I2C2:
 337                 con = readl(&cru->clksel_con[35]);
 338                 div = con >> CLK_I2C2_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 339                 break;
 340         case SCLK_I2C3:
 341                 con = readl(&cru->clksel_con[35]);
 342                 div = con >> CLK_I2C3_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 343                 break;
 344         default:
 345                 printf("do not support this i2c bus\n");
 346                 return -EINVAL;
 347         }
 348
 349         return DIV_TO_RATE(GPLL_HZ, div);
 350 }
 351
 352 static ulong rk3328_i2c_set_clk(struct rk3328_cru *cru, ulong clk_id, uint hz)
 353 {
 354         int src_clk_div;
 355
 356         src_clk_div = GPLL_HZ / hz;
 357         assert(src_clk_div - 1 < 127);
 358
 359         switch (clk_id) {
 360         case SCLK_I2C0:
 361                 rk_clrsetreg(&cru->clksel_con[34],
 362                              CLK_I2C_DIV_CON_MASK << CLK_I2C0_DIV_CON_SHIFT |
 363                              CLK_I2C_PLL_SEL_MASK << CLK_I2C0_PLL_SEL_SHIFT,
 364                              (src_clk_div - 1) << CLK_I2C0_DIV_CON_SHIFT |
 365                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C0_PLL_SEL_SHIFT);
 366                 break;
 367         case SCLK_I2C1:
 368                 rk_clrsetreg(&cru->clksel_con[34],
 369                              CLK_I2C_DIV_CON_MASK << CLK_I2C1_DIV_CON_SHIFT |
 370                              CLK_I2C_PLL_SEL_MASK << CLK_I2C1_PLL_SEL_SHIFT,
 371                              (src_clk_div - 1) << CLK_I2C1_DIV_CON_SHIFT |
 372                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C1_PLL_SEL_SHIFT);
 373                 break;
 374         case SCLK_I2C2:
 375                 rk_clrsetreg(&cru->clksel_con[35],
 376                              CLK_I2C_DIV_CON_MASK << CLK_I2C2_DIV_CON_SHIFT |
 377                              CLK_I2C_PLL_SEL_MASK << CLK_I2C2_PLL_SEL_SHIFT,
 378                              (src_clk_div - 1) << CLK_I2C2_DIV_CON_SHIFT |
 379                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C2_PLL_SEL_SHIFT);
 380                 break;
 381         case SCLK_I2C3:
 382                 rk_clrsetreg(&cru->clksel_con[35],
 383                              CLK_I2C_DIV_CON_MASK << CLK_I2C3_DIV_CON_SHIFT |
 384                              CLK_I2C_PLL_SEL_MASK << CLK_I2C3_PLL_SEL_SHIFT,
 385                              (src_clk_div - 1) << CLK_I2C3_DIV_CON_SHIFT |
 386                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C3_PLL_SEL_SHIFT);
 387                 break;
 388         default:
 389                 printf("do not support this i2c bus\n");
 390                 return -EINVAL;
 391         }
 392
 393         return DIV_TO_RATE(GPLL_HZ, src_clk_div);
 394 }
 395
 396 static ulong rk3328_mmc_get_clk(struct rk3328_cru *cru, uint clk_id)
 397 {
 398         u32 div, con, con_id;
 399
 400         switch (clk_id) {
 401         case HCLK_SDMMC:
 402         case SCLK_SDMMC:
 403                 con_id = 30;
 404                 break;
 405         case HCLK_EMMC:
 406         case SCLK_EMMC:
 407                 con_id = 32;
 408                 break;
 409         default:
 410                 return -EINVAL;
 411         }
 412         con = readl(&cru->clksel_con[con_id]);
 413         div = (con & CLK_EMMC_DIV_CON_MASK) >> CLK_EMMC_DIV_CON_SHIFT;
 414
 415         if ((con & CLK_EMMC_PLL_MASK) >> CLK_EMMC_PLL_SHIFT
 416             == CLK_EMMC_PLL_SEL_24M)
 417                 return DIV_TO_RATE(OSC_HZ, div) / 2;
 418         else
 419                 return DIV_TO_RATE(GPLL_HZ, div) / 2;
 420 }
 421
 422 static ulong rk3328_mmc_set_clk(struct rk3328_cru *cru,
 423                                 ulong clk_id, ulong set_rate)
 424 {
 425         int src_clk_div;
 426         u32 con_id;
 427
 428         switch (clk_id) {
 429         case HCLK_SDMMC:
 430         case SCLK_SDMMC:
 431                 con_id = 30;
 432                 break;
 433         case HCLK_EMMC:
 434         case SCLK_EMMC:
 435                 con_id = 32;
 436                 break;
 437         default:
 438                 return -EINVAL;
 439         }
 440         /* Select clk_sdmmc/emmc source from GPLL by default */
 441         /* mmc clock defaulg div 2 internal, need provide double in cru */
 442         src_clk_div = DIV_ROUND_UP(GPLL_HZ / 2, set_rate);
 443
 444         if (src_clk_div > 127) {
 445                 /* use 24MHz source for 400KHz clock */
 446                 src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, set_rate);
 447                 rk_clrsetreg(&cru->clksel_con[con_id],
 448                              CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
 449                              CLK_EMMC_PLL_SEL_24M << CLK_EMMC_PLL_SHIFT |
 450                              (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT);
 451         } else {
 452                 rk_clrsetreg(&cru->clksel_con[con_id],
 453                              CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
 454                              CLK_EMMC_PLL_SEL_GPLL << CLK_EMMC_PLL_SHIFT |
 455                              (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT);
 456         }
 457
 458         return rk3328_mmc_get_clk(cru, clk_id);
 459 }
 460
 461 static ulong rk3328_pwm_get_clk(struct rk3328_cru *cru)
 462 {
 463         u32 div, con;
 464
 465         con = readl(&cru->clksel_con[24]);
 466         div = (con & CLK_PWM_DIV_CON_MASK) >> CLK_PWM_DIV_CON_SHIFT;
 467
 468         return DIV_TO_RATE(GPLL_HZ, div);
 469 }
 470
 471 static ulong rk3328_pwm_set_clk(struct rk3328_cru *cru, uint hz)
 472 {
 473         u32 div = GPLL_HZ / hz;
 474
 475         rk_clrsetreg(&cru->clksel_con[24],
 476                      CLK_PWM_PLL_SEL_MASK | CLK_PWM_DIV_CON_MASK,
 477                      CLK_PWM_PLL_SEL_GPLL << CLK_PWM_PLL_SEL_SHIFT |
 478                      (div - 1) << CLK_PWM_DIV_CON_SHIFT);
 479
 480         return DIV_TO_RATE(GPLL_HZ, div);
 481 }
 482
 483 static ulong rk3328_saradc_get_clk(struct rk3328_cru *cru)
 484 {
 485         u32 div, val;
 486
 487         val = readl(&cru->clksel_con[23]);
 488         div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT,
 489                                CLK_SARADC_DIV_CON_WIDTH);
 490
 491         return DIV_TO_RATE(OSC_HZ, div);
 492 }
 493
 494 static ulong rk3328_saradc_set_clk(struct rk3328_cru *cru, uint hz)
 495 {
 496         int src_clk_div;
 497
 498         src_clk_div = DIV_ROUND_UP(OSC_HZ, hz) - 1;
 499         assert(src_clk_div < 128);
 500
 501         rk_clrsetreg(&cru->clksel_con[23],
 502                      CLK_SARADC_DIV_CON_MASK,
 503                      src_clk_div << CLK_SARADC_DIV_CON_SHIFT);
 504
 505         return rk3328_saradc_get_clk(cru);
 506 }
 507
 508 static ulong rk3328_clk_get_rate(struct clk *clk)
 509 {
 510         struct rk3328_clk_priv *priv = dev_get_priv(clk->dev);
 511         ulong rate = 0;
 512
 513         switch (clk->id) {
 514         case 0 ... 29:
 515                 return 0;
 516         case HCLK_SDMMC:
 517         case HCLK_EMMC:
 518         case SCLK_SDMMC:
 519         case SCLK_EMMC:
 520                 rate = rk3328_mmc_get_clk(priv->cru, clk->id);
 521                 break;
 522         case SCLK_I2C0:
 523         case SCLK_I2C1:
 524         case SCLK_I2C2:
 525         case SCLK_I2C3:
 526                 rate = rk3328_i2c_get_clk(priv->cru, clk->id);
 527                 break;
 528         case SCLK_PWM:
 529                 rate = rk3328_pwm_get_clk(priv->cru);
 530                 break;
 531         case SCLK_SARADC:
 532                 rate = rk3328_saradc_get_clk(priv->cru);
 533                 break;
 534         default:
 535                 return -ENOENT;
 536         }
 537
 538         return rate;
 539 }
 540
 541 static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate)
 542 {
 543         struct rk3328_clk_priv *priv = dev_get_priv(clk->dev);
 544         ulong ret = 0;
 545
 546         switch (clk->id) {
 547         case 0 ... 29:
 548                 return 0;
 549         case HCLK_SDMMC:
 550         case HCLK_EMMC:
 551         case SCLK_SDMMC:
 552         case SCLK_EMMC:
 553                 ret = rk3328_mmc_set_clk(priv->cru, clk->id, rate);
 554                 break;
 555         case SCLK_I2C0:
 556         case SCLK_I2C1:
 557         case SCLK_I2C2:
 558         case SCLK_I2C3:
 559                 ret = rk3328_i2c_set_clk(priv->cru, clk->id, rate);
 560                 break;
 561         case SCLK_PWM:
 562                 ret = rk3328_pwm_set_clk(priv->cru, rate);
 563                 break;
 564         case SCLK_SARADC:
 565                 ret = rk3328_saradc_set_clk(priv->cru, rate);
 566                 break;
 567         default:
 568                 return -ENOENT;
 569         }
 570
 571         return ret;
 572 }
 573
 574 static struct clk_ops rk3328_clk_ops = {
 575         .get_rate = rk3328_clk_get_rate,
 576         .set_rate = rk3328_clk_set_rate,
 577 };
 578
 579 static int rk3328_clk_probe(struct udevice *dev)
 580 {
 581         struct rk3328_clk_priv *priv = dev_get_priv(dev);
 582
 583         rkclk_init(priv->cru);
 584
 585         return 0;
 586 }
 587
 588 static int rk3328_clk_ofdata_to_platdata(struct udevice *dev)
 589 {
 590         struct rk3328_clk_priv *priv = dev_get_priv(dev);
 591
 592         priv->cru = (struct rk3328_cru *)devfdt_get_addr(dev);
 593
 594         return 0;
 595 }
 596
 597 static int rk3328_clk_bind(struct udevice *dev)
 598 {
 599         int ret;
 600         struct udevice *sys_child;
 601         struct sysreset_reg *priv;
 602
 603         /* The reset driver does not have a device node, so bind it here */
 604         ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset",
 605                                  &sys_child);
 606         if (ret) {
 607                 debug("Warning: No sysreset driver: ret=%d\n", ret);
 608         } else {
 609                 priv = malloc(sizeof(struct sysreset_reg));
 610                 priv->glb_srst_fst_value = offsetof(struct rk3328_cru,
 611                                                     glb_srst_fst_value);
 612                 priv->glb_srst_snd_value = offsetof(struct rk3328_cru,
 613                                                     glb_srst_snd_value);
 614                 sys_child->priv = priv;
 615         }
 616
 617         return ret;
 618 }
 619
 620 static const struct udevice_id rk3328_clk_ids[] = {
 621         { .compatible = "rockchip,rk3328-cru" },
 622         { }
 623 };
 624
 625 U_BOOT_DRIVER(rockchip_rk3328_cru) = {
 626         .name           = "rockchip_rk3328_cru",
 627         .id             = UCLASS_CLK,
 628         .of_match       = rk3328_clk_ids,
 629         .priv_auto_alloc_size = sizeof(struct rk3328_clk_priv),
 630         .ofdata_to_platdata = rk3328_clk_ofdata_to_platdata,
 631         .ops            = &rk3328_clk_ops,
 632         .bind           = rk3328_clk_bind,
 633         .probe          = rk3328_clk_probe,
 634 };